Many agencies have been interested in the solution of the problem of drug addiction. The Division of Mental Hygiene of the United States Public Health Service includes among its functions ( 1 ) the administration of two federal institutions for the confinement and treatment of persons addicted to the use of habit forming drugs, (2) the conduct of studies dealing with the nature of drug addiction and (3) possible methods of treatment and rehabilitation of persons addicted to the use of habit forming drugs, and (4) the supervision and furnishing of the medical and psychiatric services in the federal prison system. The National Research Council, the Rockefeller Foundation, the U. S. Public Health Service, the U. S. Bureau of Narcotics, the University of Virginia and the University of Michigan are some of the other institutions which participate in the prosecution of the studies.